Ответ:Решение:\( (8x - 30) : 2 = 225 \)\( 8x - 30 = 225 \cdot 2 \)\( 8x - 30 = 450 \)\( 8x = 450 + 30 \)\( 8x = 480 \)\( x = \frac{480}{8} \)\( x = 60 \)Ответ: x = 60.